i recently installed a new board for friends, its a TT system, so the board is split between 100mA and 30mA rcds. The boiler is on the kitchen ring circuit protected by the 30mA. every night the rcd trips around the same time, i have already had the kitchen ring off for a night, so its definatly on that circuit. Havnt testing anything yet, but does look like its the boiler tripping out the rcd once its heated up. Never really had this problem before so just wondering on ideas. should i put the boiler on a seperate circuit under the 100mA?